Starter is sluggish after refresh

Hello everyone,

I have a fairly new starter, about a month old, that I've been keeping in the fridge for a week.  I took it out of the fridge on Wednesday to refresh with the hopes of baking with it this weekend.  When I took it out of the fridge, there was a layer of hooch that I just stired down.  After feeding, it is not doubling as quickly as it was before I stuck it in the fridge.  I'm keeping it at 100% hydration and am feeding it 1:1:1.  It has been almost 10 hours and it's only risen about 50%.  The house is on the cooler side, ~68 Degrees F.  Is this normal behavior?  I hope I haven't killed it.